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Vishay General Semiconductor - Diodes Division SMB8J14CA-E3/5B
- Part No.:
- SMB8J14CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CA-E3/5B.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,670
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Product details
Overview
SMB8J14CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 14 V stand-off voltage (VWM), 23.2 V clamping voltage (VC) at 34.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - optimized for automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J14CA-E3/5B datasheet, SMB8J14CA-E3/5B pinout, SMB8J14CA-E3/5B application, or SMB8J14CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (VBR min = 15.6 V, max = 17.2 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance under repetitive surge stress.
Rated for -55 °C to +150 °C junction temperature, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 13" tape-and-reel delivery (3200 pcs), and is halogen-free RoHS-compliant with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - maximum continuous reverse working voltage before clamping activation; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - precise avalanche onset range ensuring predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 23.2 V at IPPM = 34.5 A - limits downstream voltage stress during 10/1000 µs surge, protecting 24 V-rated ICs. |
| PPPM (Peak Pulse Power) | 800 W - energy-handling capacity for bidirectional transients; enables robust protection against ISO 7637-2 Pulse 1/2a/5a. |
| ID (Reverse Leakage) | <1.0 µA at VWM - negligible standby current, critical for low-power sensor nodes and battery-backed systems. |
| TJ max | +150 °C - supports under-hood automotive environments and high-temperature industrial enclosures without derating. |
| RθJA | 72 °C/W - thermal performance baseline for PCB layout design using 0.2" × 0.2" copper pads per terminal. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking - symmetrical terminals suitable for AC-coupled or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage in either direction when |V| > VBR - eliminates orientation concerns in layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ASIL-B system interfaces. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability across 1000+ surge cycles without degradation. |
| Low-profile SMB package | Height ≤ 2.2 mm - enables compact placement near connectors or ICs without interfering with mechanical shields or mating components. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak - no pre-baking required for production assembly. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20E and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector entry point to limit voltage excursions before reaching sensitive ASICs. Use Value: Clamps 800 W surges to ≤23.2 V while maintaining <1.0 µA leakage - preserves signal integrity and avoids false triggering in low-voltage sensor references. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Withstands repeated 10/1000 µs transients up to 34.5 A without parameter shift - ensures long-term calibration stability in factory automation equipment. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE-powered devices from lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: First-stage TVS on differential data lines, placed ahead of common-mode chokes and secondary protection devices. Use Value: Symmetrical bidirectional response enables identical protection on both line polarities - simplifies layout and eliminates polarity-matching errors. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and solenoids in washing machines, HVAC actuators, and power tools. IC Role / Device Role / Timing Role: Snubber-style clamp across motor terminals or MOSFET drain-source to absorb inductive kickback energy. Use Value: 72 °C/W thermal resistance allows direct mounting on FR-4 without heatsinks - reduces BOM count and improves cost-efficiency in high-volume white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA-E3/5B | Same SMB package and 14 V VWM, but rated for 1000 W PPPM (unidirectional only); bidirectional variant not offered in SMBJ series. | Limited to unidirectional use; unsuitable for AC or differential signal lines requiring symmetrical clamping. | Select SMB8J14CA-E3/5B when bidirectional protection and AEC-Q101 qualification are mandatory. |
| SMCJ14CA-E3/57T | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; same VWM and VC, but RθJA = 35 °C/W and height ~2.6 mm. | Better thermal performance but requires more board area; not drop-in compatible due to footprint and height mismatch. | Choose SMCJ14CA-E3/57T only if surge energy exceeds 800 W and PCB space permits larger package. |
Compared with SMBJ14CA-E3/5B and SMCJ14CA-E3/57T, SMB8J14CA-E3/5B uniquely delivers AEC-Q101-qualified bidirectional clamping in the compact SMB footprint - making it the optimal choice for space-constrained automotive and industrial designs requiring symmetrical transient immunity.
Availability
SMB8J14CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply and full traceability.
Supply support for SMB8J14CA-E3/5B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-density, AEC-Q101-compliant transient suppression in automotive and harsh-environment industrial systems.
FAQ
What is the clamping voltage of SMB8J14CA-E3/5B at its rated peak pulse current?
The SMB8J14CA-E3/5B has a maximum clamping voltage (VC) of 23.2 V when subjected to its specified peak pulse current (IPPM) of 34.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains within safe operating limits during surge events. The SMB8J14CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J14CA-E3/5B suitable for automotive applications?
Yes, SMB8J14CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from -55 °C to +150 °C. The SMB8J14CA-E3/5B is commonly deployed in ADAS sensor interfaces, body control modules, and infotainment power rails where bidirectional transient immunity is required.
How does SMB8J14CA-E3/5B differ from unidirectional variants like SMB10J14A-E3/5B?
The SMB8J14CA-E3/5B is bidirectional with symmetrical clamping behavior, while SMB10J14A-E3/5B is unidirectional and conducts only in reverse bias. The "C" suffix denotes bidirectionality, and the "8" prefix indicates 800 W PPPM (vs. 1000 W for SMB10JxxA). Both share identical VWM (14 V) and VC (23.2 V), but SMB8J14CA-E3/5B supports AC-coupled or differential signal protection where polarity is undefined - a key distinction in SMB8J14CA-E3/5B's design intent.
What is the recommended PCB pad layout for SMB8J14CA-E3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal to achieve the rated thermal resistance (RθJA = 72 °C/W) and surge current handling. The SMB8J14CA-E3/5B datasheet provides exact outline dimensions: 0.155"–0.130" length, 0.180"–0.160" width, and 0.086"–0.077" height. Adhering to this layout ensures reliable power dissipation and prevents thermal runaway during repetitive surge events involving SMB8J14CA-E3/5B.
Does SMB8J14CA-E3/5B require orientation during PCB placement?
No, SMB8J14CA-E3/5B does not require specific orientation because it is a bidirectional TVS diode with symmetrical terminals and no cathode marking. Unlike unidirectional variants, the SMB8J14CA-E3/5B functions identically regardless of PCB placement direction - simplifying automated assembly and eliminating risk of reverse installation. This symmetry is intrinsic to the SMB8J14CA-E3/5B device architecture and confirmed in Vishay's mechanical drawings.
SMB8J14CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J14CA-E3/5B FAQ
1.How can I place an order for SMB8J14CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CA-E3/5B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB8J14CA-E3/5B reliable?
The price and inventory of SMB8J14CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J14CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J14CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CA-E3/5B?
SMB8J14CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CA-E3/5B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB8J14CA-E3/5B?
For technical support, including SMB8J14CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J14CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J14CA-E3/5B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB8J14CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J14CA-E3/5B?
All SMB8J14CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CA-E3/5B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB8J14CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J14CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14CA-E3/5B Tags
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